/*
This is part of Screenbar, which is based in part on the Litestep
shell source code.

Copyright (C) 2008-2009 Jim Babcock
Copyright (C) 1997-2009 The LiteStep Development Team

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/
#pragma once

class ScreenbarWindow
{
protected:
	enum WindowTransparency {
		opaque,
		colorKeyed,
		alphaOverlay,
	};
	
public:
	ScreenbarWindow(string prefix, Monitor *monitor);
	virtual ~ScreenbarWindow();
	
	static void registerWindowClass();
	static void unregisterWindowClass();
	static LRESULT CALLBACK eventHandler(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
	
	virtual LRESULT handleEvent(UINT uMsg, WPARAM wParam, LPARAM lParam);
	
	HWND initWindow(DWORD style, HWND parent);
	void setTransparencyMode(WindowTransparency newMode);
	void initLayout(const ElementContext *rootContext);
	void adjustWindowPos();
	void show();
	
	HDC getDrawContextForSize();
	void repaint();
		
	void checkForUpdates();
	void forceRedraw();
	
	string getPrefix();
	Layout *getLayout();
	HWND getWindow();
	Rect getRect();
	Point getTopLeft();
	Monitor *getMonitor();
	Direction getAnimationDirection();
	
protected:
	void createBackBuffer();
	void destroyBackBuffer();
	void clearBackBuffer();
	void flipBackBuffer(HDC windowDrawContext);
	
	void beginAnimation(Animation *animation, int trigger);
	void finishAnimation();
	void updateAnimation();
	
	virtual void onFinishAnimation(int trigger);
	
	string prefix;
	Rect visibleRect;
	Layout *layout;
	Monitor *monitor;
	
	HWND window;
	
	bool alwaysOnTop;
	WindowTransparency transparency;
	WindowTransparency currentTransparency;
	int opacity;
	COLORREF fillColor;
	Direction animationDirection;
	
	Animation *createAnimation;
	
	BackBuffer *backBuffer;
	AnimationState animationState;
};
